TWI544195B - An insulated box and a refrigerator having the insulated cabinet - Google Patents

Description

Insulation box and refrigerator having the same

The present invention relates to a heat insulating box having a foamed heat insulating material and a vacuum heat insulating material, and a refrigerator having the heat insulating box.

In recent years, based on the viewpoint of global environmental protection and the safety of nuclear power plants, various methods of saving resources, saving energy, and especially saving electricity have been proposed.

In particular, in terms of energy saving and power saving, the technology of disposing a vacuum heat insulating material in a heat insulating box has been progressed, and a technique of bending a vacuum heat insulating material is disclosed in Japanese Patent No. 4778996.

Fig. 5 is a cross-sectional view showing the structure of a general vacuum heat insulating material.

The vacuum heat insulating material 1 has a structure in which two outer covering members 4 are stacked to form a part of a bag having an outer peripheral opening, and the filler material 2 and the desiccant 3 are placed inside the bag body, and the inside of the bag body is drawn. After the vacuum is applied, the opening is melted, thereby maintaining the vacuum. In this way, the thermal conductivity of the vacuum heat insulating material 1 is 0.0020 W/Mk, which is comparable to the foamed heat insulating material such as urethane foam used as a heat insulating material in the past. Achieve about 10 times the thermal insulation performance.

Here, the exterior material 4 is composed of, for example, a sealing layer 5 for melting the same, a gas barrier layer 6 for preventing water vapor or the like from entering the vacuum heat insulating material 1, and preventing the exterior material 4 from being damaged. Protective layer 7. Here, aluminum is used in the gas barrier layer 6. Therefore, in the vacuum insulation material 1, when heat is transferred to the vacuum insulation material In the case of the one side surface, heat is transferred from the aluminum of the gas barrier layer 6 of the exterior material 4 constituting the surface to the aluminum of the gas barrier layer 6 of the exterior material 4 constituting the other surface, and it is confirmed that the heat is wound into the vacuum barrier. A heat bridge phenomenon on the other side of the hot material 1. Therefore, when the thermal bridge phenomenon occurs, the effective area of the vacuum heat insulating material 1 is smaller than it appears. Depending on the type of the exterior material 4, when the vacuum heat insulating material 1 is placed in the urethane foam, when the vacuum heat insulating material 1 having a width of 200 mm or less is used, the heat is caused by the heat bridge phenomenon. The intrusion is much lower than the amount of heat intrusion of the vacuum heat insulating material 1, resulting in a counter effect.

The thermal bridge phenomenon can be suppressed by increasing the area of one piece of the vacuum heat insulating material 1, as a means for suppressing the thermal bridge phenomenon. Therefore, the vacuum heat insulating material 1 is used in such a manner that when the vacuum heat insulating material is provided in the step portion, the efficiency achieved by bending one piece of the vacuum heat insulating material 1 is higher than dividing the vacuum heat insulating material 1 into a plurality of pieces. use.

Advanced technical literature Patent literature

Patent Document 1: Patent No. 4778996

However, when the vacuum heat insulating material 1 is directly attached to the wall surface of the inner box or the outer box which constitutes the heat insulating box, and the edge of the vacuum heat insulating material 1 is in contact with the wall surface, the gas of the outer material 4 is isolated. The aluminum of the layer 6 easily absorbs the temperature of the wall surface from the edge of the vacuum heat insulating material 1, and therefore, the heat bridge phenomenon easily occurs, resulting in a problem that the heat insulating performance of the heat insulating box body is lowered.

In order to solve the above problems, the present invention has an object of providing a heat insulating box and a refrigerator having the same, which is more resistant to the present invention than in the past. The thermal bridge phenomenon occurs and is more energy efficient.

The heat insulating box body of the present invention comprises: an inner box, an outer box, a vacuum heat insulating material filled in a space between the inner box and the outer box, and a foam heat insulating material, wherein the heat insulating box forms a lower part a machine chamber that is recessed inwardly to configure a compressor, and a bent vacuum partition is disposed from the bottom to the vertical wall at the bottom of the heat insulating box and inside the vertical wall of the machine room rising from the bottom In the outer casing, at least one first convex portion protruding toward the inner casing side is formed at least in a range constituting the vertical wall, and the vacuum heat insulating material provided from the bottom portion to the vertical wall is provided The inner box and the outer box are in contact with the first convex portion, and are disposed apart from the portion other than the first convex portion of the outer box in the vertical wall by a specific distance.

Further, the refrigerator of the present invention includes: the heat insulating box of the present invention, and a cooling device having a compressor for cooling air supplied to a storage chamber formed in the heat insulating box, the cooling device The compressor is disposed in the machine room.

In the present invention, the outer casing forms a first convex portion that protrudes toward the inner casing side. Further, in the present invention, in the range in which the first convex portion is formed, the vacuum heat insulating material is provided between the inner box and the outer box, and is in contact with the first convex portion. Therefore, in the present invention, the vacuum heat insulating material provided in the range does not contact the wall surface of the outer box or the inner box, and the heat bridge phenomenon can be suppressed more than in the past. Therefore, the present invention can achieve a heat-insulating cabinet which is more energy-efficient than in the past and a refrigerator having the same.

In particular, the present invention, in the outer casing portion constituting the vertical wall of the machine room The first convex portion is formed, and a vacuum heat insulating material is placed between the inner box and the outer box in the vertical wall, and is in contact with the first convex portion. Here, the temperature of the vertical wall of the machine room is likely to rise due to the compressor, and the temperature difference between the inside of the heat insulating box (the space on the inner circumference side of the inner box, for example, the storage compartment of the refrigerator) is likely to increase. According to the present invention, it is possible to reduce the amount of heat intrusion from the vertical wall portion of such a machine room, and therefore, it is possible to obtain a more energy-saving heat insulating box and a refrigerator having the heat insulating box.

Further, the present invention can prevent the edge of the vacuum heat insulating material from coming into contact with the wall surface of the outer box or the inner box without adding a new component. Therefore, the present invention can attain a heat-insulating heat insulating box and a refrigerator having the same.

1‧‧‧Vacuum insulation

2‧‧‧Filling materials

3‧‧‧Drying agent

4‧‧‧External materials

5‧‧‧ Sealing layer

6‧‧‧ gas barrier

7‧‧‧Protective layer

8‧‧‧Insulation box

9‧‧‧Outer box

10‧‧‧ inner box

11‧‧‧Foam insulation

13‧‧‧ machine room

14‧‧‧立立

15‧‧‧ bottom

16a‧‧‧ convex part (first convex part)

16b‧‧‧ convex part (2nd convex part)

18‧‧‧Injection

19‧‧‧Insulation

20‧‧‧Storage room

21‧‧‧ District partition

22‧‧‧Refrigerator

23‧‧‧Freezer

24‧‧ ‧ vegetable room

25‧‧‧ Doors

30‧‧‧Cooling device

31‧‧‧Compressor

32‧‧‧ cooler

35‧‧‧Cooling room

36‧‧‧Fan grille

38‧‧‧cooler fan

100‧‧‧ refrigerator

Fig. 1 is a side sectional view showing a refrigerator according to a first embodiment of the present invention.

Fig. 2 is an explanatory view for explaining a manufacturing procedure of the heat insulating box according to the first embodiment of the present invention.

Fig. 3 is an enlarged plan view showing the vicinity of the lower portion of the refrigerator in the first embodiment of the present invention (a side sectional view).

Fig. 4 is an enlarged plan view showing the vicinity of the lower portion of the refrigerator in the second embodiment of the present invention (a side sectional view).

Fig. 5 is a cross-sectional view showing the structure of a general vacuum heat insulating material.

Hereinafter, an embodiment of the heat insulating box of the present invention and a refrigerator having the heat insulating box will be described with reference to the drawings.

Embodiment 1

Fig. 1 is a side sectional view showing a refrigerator according to a first embodiment of the present invention. In addition, The left side of the first drawing is the front side of the refrigerator 100.

The heat insulating box 8 of the refrigerator 100 according to the first embodiment mainly includes an outer box 9 that forms the outer peripheral surface of the heat insulating box 8, and a space that is filled between the inner peripheral side of the outer box 9 and the outer peripheral side of the inner box 10. Vacuum insulation material 1 and foam insulation material 11. The vacuum heat insulating material 1 is provided, for example, at the top, the left and right side walls, the back surface portion, the bottom portion, and the like of the heat insulating box 8. Further, the vacuum heat insulating material 1 is a vacuum heat insulating material shown in Fig. 5. Further, the foamed heat insulating material 11 is, for example, a hard urethane foam.

The inside of the heat insulating box 8 configured as described above (that is, the inner peripheral side of the inner box 10) is partitioned by a plurality of partition plates 21, and forms a refrigerating chamber 22, a freezing chamber 23, and a user's use form. The vegetable compartment 24 or the like has a plurality of storage compartments 20 having different temperatures. The storage compartment 20 is opened to the front, and the opening in front of each storage compartment 20 is freely opened and closed by the door piece 25.

Further, in the lower portion of the back surface side of the heat insulating box 8, a portion of the lower portion thereof is recessed toward the front side (that is, the inner side of the heat insulating box 8) to form the machine room 13. The compressor 31 of the cooling device 30 to be described later is disposed in the machine room 13.

The cooling device 30 is composed of a compressor 31, a condensing pipe (not shown), a pressure reducing device (expansion valve or capillary tube) not shown, and a cooler 32. Among these constituent elements of the cooling device 30, the compressor 31 and the decompression device are provided in the machine room 13 formed at the lower portion of the back side of the heat insulating box 8. The condensing pipe is provided, for example, at a side surface portion of the heat insulating box 8. The cooler 32 is disposed in the cooling chamber 35 formed by the inner box 10 and the fan grill 36. Further, in this cooling chamber 35, a cooler fan 38 is also provided for supplying the air cooled in the cooler 32 to each of the storage compartments 20.

The heat insulating box 8 configured as described above is manufactured, for example, as described later. First, the vacuum heat insulating material 1 is fixed to the outer casing 9 in advance. Then, the outer box 9 and the inner box 10 are fixed by, for example, the following. Then, as shown in Fig. 2, the raw material of the liquid foamed heat insulating material 11 is injected into the injection port 18 formed on the back side in a state in which the back surface side of the heat insulating box 8 faces upward, and is integrated. The foaming is thereby filled in the space between the outer casing 9 and the inner casing 10 with the foamed heat insulating material 11.

As described above, the compressor 31 of the cooling device 30 is disposed in the machine room 13. Therefore, the temperature in the machine room 13 rises due to the operation of the compressor 31. Therefore, a large amount of heat is transmitted through the vertical wall 14 which is the front side wall of the machine room 13 (the wall which rises from the bottom of the heat insulating box 8), and it flows into the storage room 20 from the machine room 13.

Therefore, as shown below, the vacuum heat insulating material 1 is provided on the heat insulating box 8 of the refrigerator 100 of the first embodiment.

Fig. 3 is an enlarged plan view showing the vicinity of the lower portion of the refrigerator in the first embodiment of the present invention (a side sectional view). In addition, the left side of FIG. 3 is the front side of the refrigerator 100.

As shown in Fig. 3, in the heat insulating box body 8 of the first embodiment, in order to improve the heat insulating performance of the standing wall 14 which is the front side wall of the machine room 13, the vacuum heat insulating material 1 is provided in the standing wall 14. Therefore, when the vacuum heat insulating material 1 is small, the heat bridge phenomenon easily occurs. Therefore, in the first embodiment, the vacuum heat insulating material 1 provided on the bottom portion 15 of the heat insulating box 8 and the vacuum heat insulating material 1 provided on the standing wall 14 are formed as one element. That is, the vacuum heat insulating material 1 is bent into a substantially L shape, and the vacuum heat insulating material is placed on the bottom portion 15 to the standing wall 14. Thereby, the entire vacuum heat insulating material 1 provided on the standing wall 14 can be enlarged. In the size of the vacuum heat insulating material 1, the portion of the edge of the vacuum heat insulating material 1 disposed on the vertical wall 14 is reduced, so that the heat bridge phenomenon in the vacuum heat insulating material 1 can be suppressed.

Further, the range of the outer wall 9 constituting the standing wall 14 faces the machine room 13, and therefore, the temperature thereof rises. Therefore, when the vacuum heat insulating material 1 is attached to the range of the vertical wall 14 constituting the vertical wall 14, the edge of the vacuum heat insulating material 1 contacts the range of the outer wall 9 constituting the vertical wall 14, and the outer casing 9 may be absorbed from the edge. The temperature of the range of the vertical wall 14 is formed, and there is a thermal bridge phenomenon in the vacuum heat insulating material 1. Therefore, in the first embodiment, at least one convex portion 16a that protrudes toward the inner casing 10 side is formed in the range of the outer casing 9 that constitutes the vertical wall 14. In addition, the tip end portion of the convex portion 16a is formed in an arc shape or a flat shape, and the vacuum heat insulating material 1 is not easily broken even when it is in contact with the vacuum heat insulating material 1. Further, in the vacuum heat insulating material 1, the portion disposed on the standing wall 14 is attached (contacted) to the convex portion 16a. With such a configuration, in the upright wall 14, the outer casing 9 portion other than the convex portion 16a and the vacuum heat insulating material 1 are disposed to be separated by a specific distance. Therefore, it is possible to prevent the edge of the vacuum heat insulating material 1 from coming into contact with the range of the upright wall 14 of the outer casing 9, and it is possible to more effectively suppress the thermal bridge phenomenon in the vacuum heat insulating material 1.

Here, the convex portion 16a corresponds to the first convex portion of the present invention.

In the first embodiment, at least one convex portion 16b that protrudes toward the inner casing 10 side is formed in the range of the bottom portion 15 of the outer casing 9 (four convex portions 16b are described in Fig. 3). . In addition, the tip end portion of the convex portion 16b is formed in an arc shape or a flat shape, and the vacuum heat insulating material 1 is not easily broken even when it is in contact with the vacuum heat insulating material 1. Further, in the vacuum heat insulating material 1, the portion disposed on the bottom portion 15 and the convex portion 16b are attached (contacted). With such a configuration, in the bottom portion 15, the outer casing 9 portion except the convex portion 16b and the vacuum heat insulating material 1 are disposed to be separated by a specific distance. Therefore, it is possible to prevent the edge of the vacuum heat insulating material 1 from coming into contact with the outside. The range of the bottom portion 15 of the tank 9 is more capable of suppressing the thermal bridge phenomenon in the vacuum heat insulating material 1.

Here, the convex portion 16b corresponds to the second convex portion of the present invention.

As described above, in the first embodiment, in the vertical wall 14, the outer casing 9 portion other than the convex portion 16a and the vacuum heat insulating material 1 are disposed at a predetermined distance apart, and the edge of the vacuum heat insulating material 1 can be prevented from coming into contact with each other. The range of the outer wall 9 constituting the vertical wall 14. Therefore, the heat insulating box 8 of the first embodiment and the refrigerator 100 having the heat insulating box 8 can suppress the heat from passing through the standing wall 14 and enter the storage chamber 20 from the machine room 13 more than in the past, thereby achieving energy saving more than in the past. The product.

Further, in the first embodiment, in the bottom portion 15, the outer casing 9 portion other than the convex portion 16b and the vacuum heat insulating material 1 are disposed at a predetermined distance apart, and the edge of the vacuum heat insulating material 1 can be prevented from coming into contact with the outside. The range of the bottom 9 of the box 9 is constructed. Therefore, in the heat insulating box 8 of the first embodiment and the refrigerator 100 having the heat insulating box 8, it is possible to suppress the heat permeation of the bottom portion 15 from entering the storage chamber 20, and it is possible to obtain a more energy-saving product than in the past.

Further, in the first embodiment, when the outer casing 9 constituting the vertical wall 14 and the bottom portion 15 and the vacuum heat insulating material are disposed separately, the convex portion 16a and the convex portion 16b formed in the outer casing 9 are used. Therefore, when the outer casing 9 constituting the vertical wall 14 and the bottom portion 15 and the vacuum heat insulating material are disposed separately, it is not necessary to add a new component, so that the heat insulating box 8 of the first embodiment which is more energy-efficient than in the past can be obtained at low cost. And the refrigerator 100 having the heat insulating box 8.

Further, the number of formation of the convex portion 16a and the convex portion 16b in the first embodiment is any number. As long as the outer casing 9 constituting the vertical wall 14 and the bottom portion 15 and the vacuum heat insulating material can be disposed separately, it is only necessary to have only one. At this time, it will be convex The portion 16a and the convex portion 16b are preferably provided at positions opposing the vicinity of the tip end portion of the vacuum heat insulating material 1. It is easier to prevent the edge of the vacuum heat insulating material 1 from coming into contact with the outer box 9.

Embodiment 2

The configuration in which the vacuum heat insulating material 1 is disposed on the vertical wall 14 and the bottom portion 15 of the heat insulating box 8 is not limited to the configuration described in the first embodiment, and may be, for example, a configuration as will be described later. Further, in the second embodiment, the same configuration as that of the first embodiment is not particularly described, and the same function or configuration will be described using the same reference numeral.

Fig. 4 is an enlarged plan view showing the vicinity of the lower portion of the refrigerator in the second embodiment of the present invention (a side sectional view). In addition, the left side of FIG. 4 is the front side of the refrigerator 100.

In the heat insulating box 8 of the second embodiment, the convex portion 16b is not formed in the range of the bottom portion 15 of the outer casing 9. Further, the vacuum heat insulating material 1 disposed on the bottom portion 15 to the standing wall 14 is wound around a tip end of a portion disposed at the bottom portion 15 with a heat insulating material 19 such as soft urethane foam formed in a strip shape. Therefore, the portion of the vacuum heat insulating material 1 disposed at the bottom portion 15 to the standing wall 14 disposed at the bottom portion 15 is disposed to be in contact with (the contact with) the range of the bottom portion 15 constituting the outer box 9. At this time, since the heat insulating material 19 is wound around the tip end of the portion where the vacuum heat insulating material 1 is disposed at the bottom portion 15, it is possible to prevent the edge of the vacuum heat insulating material 1 from coming into contact with the range of the bottom portion 15 constituting the outer box 9, and Suppress the thermal bridge phenomenon.

When the foamed heat insulating material 11 is filled between the outer casing 9 and the inner casing 10, if the space for filling the foamed heat insulating material 11 is narrow, the rate of unfilling of the foamed heat insulating material 11 is rapidly increased. Therefore, it is necessary to ensure a minimum width (for example, 5 mm) of the space in which the foamed heat insulating material 11 is filled. Here, in the case where the vacuum heat insulating material 1 is provided at the bottom of the heat insulating box 8 as in the first embodiment, the foaming partition must be provided. The hot material 11 is filled in the space between the vacuum heat insulating material 1 and the outer case 9, and between the vacuum heat insulating material 1 and the inner box 10. Therefore, in the case where the vacuum heat insulating material 1 is provided at the bottom of the heat insulating box 8 as in the first embodiment, it is necessary to secure the bottom portion 15 in the space between the outer box 9 and the inner box 10 of the bottom portion 15. In the thickness direction (up and down direction), there is at least a space of, for example, a width of 10 mm. On the other hand, when the vacuum heat insulating material 1 is provided in the bottom of the heat insulating box 8 as in the second embodiment, the foam heat insulating material 11 is filled in the vacuum heat insulating material 1 and the inner box 10 The space between them can be. Therefore, when the vacuum heat insulating material 1 is provided in the bottom of the heat insulating box 8 as in the second embodiment, in the space between the outer box 9 and the inner box 10 of the bottom portion 15, it is only necessary to ensure the bottom portion 15 In the thickness direction (up and down direction), for example, a space having a width of 5 mm may be used. Therefore, by forming the heat insulating box 8 as in the second embodiment, the thickness of the bottom portion 15 can be reduced to be lower than that of the first embodiment.

As described above, the heat insulating box 8 of the second embodiment and the refrigerator 100 having the heat insulating box are disposed in the vertical wall 14 in the outer casing 9 except the convex portion 16a and the vacuum heat insulating material 1 are arranged to be separated. The specific distance prevents the edge of the vacuum heat insulating material 1 from coming into contact with the range of the outer wall 9 constituting the vertical wall 14. Therefore, in the heat insulating box 8 of the second embodiment and the refrigerator 100 having the heat insulating box 8, as in the first embodiment, it is possible to suppress the heat from passing through the standing wall 14 and intruding into the storage chamber 20 from the machine room 13 as compared with the past. And can get more energy-efficient products than in the past.

Further, in the second embodiment, the heat insulating material 19 is wound around the tip end of the portion where the vacuum heat insulating material 1 is disposed at the bottom portion 15, so that the edge of the vacuum heat insulating material 1 can be prevented from coming into contact with the bottom portion constituting the outer casing 9. The scope of 15. Therefore, the heat insulating box 8 of the second embodiment and the refrigerator 100 having the heat insulating box 8 can prevent the heat from passing through the bottom portion 15 and enter the storage chamber 20, thereby achieving a more energy-saving product than in the past.

Further, in the heat insulating box 8 of the second embodiment and the refrigerator 100 having the heat insulating box 8 as compared with the first embodiment, the thickness of the bottom portion 15 of the heat insulating box 8 can be reduced, so that it is not necessary to change the outer size. The internal volume of the storage room 20 can be increased, and the storage property of foods and the like can be improved.

Further, in the second embodiment, the band-shaped heat insulating material 19 is wound around the tip end of the portion where the vacuum heat insulating material 1 is placed on the bottom portion 15. The present invention is not limited thereto, and the band-shaped heat insulating material 19 may be attached to the range facing the outer casing 9 in the vicinity of the tip end of the portion where the vacuum heat insulating material 1 is disposed at the bottom portion 15. With such a configuration, it is also possible to prevent the edge of the vacuum heat insulating material 1 from coming into contact with the range of the bottom portion 15 constituting the outer casing 9.

1‧‧‧Vacuum insulation

8‧‧‧Insulation box

9‧‧‧Outer box

10‧‧‧ inner box

11‧‧‧Foam insulation

13‧‧‧ machine room

14‧‧‧立立

15‧‧‧ bottom

16a‧‧‧ convex

16b‧‧‧ convex

20‧‧‧Storage room

31‧‧‧Compressor

Claims (4)

The heat insulation box comprises: an inner box, an outer box, a vacuum heat insulating material filled in a space between the inner box and the outer box, and a foamed heat insulating material, wherein the heat insulating box forms a part of the lower part The inner side is recessed to form a mechanical chamber in which the compressor is disposed, and a bent vacuum insulation is disposed from the bottom to the vertical wall at the bottom of the heat insulating box and inside the vertical wall of the machine room rising from the bottom In the outer casing, at least one first convex portion protruding toward the inner casing side is formed at least in a range constituting the vertical wall, and the vacuum heat insulating material provided from the bottom portion to the vertical wall is provided on The inner box and the outer box are in contact with the first convex portion, and are disposed in the vertical wall and separated from the outer box portion except the first convex portion by a specific distance; the strip-shaped partition The hot material coil is attached to the vicinity of the tip end portion of the portion disposed at the bottom portion, or a heat insulating material is attached to the outer casing in the vicinity of the tip end portion of the portion disposed at the bottom portion. The heat insulating box according to claim 1, wherein the outer box is within a range constituting the bottom portion, and is disposed within a range of the vacuum heat insulating material disposed from the bottom portion to the vertical wall, No convex portion protruding toward the inner box side is formed. The heat insulating box according to claim 1 or 2, wherein the first convex portion is provided at a position opposed to a vicinity of a tip end portion of the vacuum heat insulating material portion of the vertical wall. A refrigerator comprising: The heat insulating box according to any one of claims 1 to 3, and a cooling device having a compressor for cooling air supplied to a storage chamber formed in the heat insulating box, A compressor of the cooling device is disposed in the machine room.